1905-1909Some mixed-ligand, trinuclear complexes
of mixed-valence iron (III, III, II) and dinuclear cobalt(II) have been
synthesized by enforced substitution of acetate ions from their respective
acetate complexes. The isolated products of the types [Fe3O(OOCR)3(OOCR'SH)3]
and [Co(OOCR)(OOCR'SH)]2(where R = C7H15, C11H23
or C15H31 and R' = -CH2CH2-) are
mixed (carboxylato)(mercaptocarboxylato) complexes. These have been characterized by microanalytical data and
infrared, UV visible and Mossbauer spectra. Non-electrolytic behaviour and
polynuclear nature of the complexes have been assessed from their low
conductance and high molecular weight data. The octahedral environment around
both the metals has been suggested on the basis of UV-visible and magnetic
moment data. Mossbauer
studies reveal two resolved quadrupole
doublets due to Fe(II) and Fe(III) confirming the valence-localised
classification of the iron compounds